The answer to 'why is my dimmer switch tripping breaker' is that there are a few common causes, including an overloaded circuit, a faulty dimmer switch, or a short circuit in the wiring. A tripping breaker is a safety mechanism to prevent electrical fires, but it can be frustrating to deal with.
One of the most common reasons a dimmer switch trips the breaker is that the circuit is overloaded. Dimmer switches are designed to control the amount of power going to the lights, but if you have too many lights or high-wattage bulbs on the same circuit, it can overload the system and cause the breaker to trip. Another issue could be a faulty or outdated dimmer switch that is no longer functioning properly.